Electrical apparatus



Dec. 22, 1931. STARR 1,837,298

ELECTRICAL APPARATUS Filed Sept. 30, 1929 INVENTOR A TTORNE Y Patented Dec. 22, 1931 UNITED STAT S PATENT OFFICE FRANK r srmnaor DAYTON," OHIO, ASSIGNOR fro DELCO-LIGI-IT COMPANY, or"

DAYTON, OHIO, A conronnrron or DELAWARE ELECTRICAL APPARATUS The present invention relates to internal combustion engines and more particularly to the automatic controls for the supply of fuel thereto.

" One of the objects of the present invention is to provide a fuel discharging device for priming an internal combustion engine during the starting thereof which is simple in its operation and which operates independ;

ently of the main jet of'the engine carburetor. One manner of carrying out this idea is to provide an auxiliary fuel jet, and to arrange for controlling the level of fuel in the jet by the level of fuel in the carburetor, and to pro- 1 vide a valve for controlling the jet, which valve may be controlled automatically.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to V.

the accompanying drawings, wherein a preferred form of the present invention is clearly shown. 7

In the drawings:

Fig. 1 is a diagrammatic illustration of the 7'25 present invention; and

Fig. 2 is a sectional view of the engine car- 1 control 70 carried by the'casting 60. The

buretor and auxiliary fuel jet Referring to the drawings the numeral designates an internal combustion engine having a fuel intake 21 which is in communication with a passageway 23 formed by a carburetor 24. Any suitable means may be employed for supplying fuel to the carburetor 24. In the present case Ihave provided, preferably, a fuel pump 25 connected with a supply tank 27 by pipe 28. The fuel pump 25 is provided with an outlet pipe 29 which is connected with a fuel bowl 33 of the carburetor 24. i

The carburetor includes preferably the usual main jet 35 through which fuel may be supplied to the engine by the suction created by the engine cylinders, and, if'dea return pipe- 38 which is connected with the sive fuel to the supply tank to thus maintain a predetermined level of fuel in the carbu:

retor bowl 33 which level is indicated at 40. It is to be understood, however, that other 7 ried by a casting which isconnectedwith means for maintaining a predetermined level V of fuel. in the carburetor bowl' may be em- ,ployed, such as, for example, the conventional float valve.

In order to aid in startingthe engine 20 I have provided an auxiliary fueljet 5O having a well 51 which is adapted to be controlled by a valve 52 formed in one end of a plunger 53, and havinga seat 54; on the well casing 54a. The well 51 is supplied with fuel from the bowl 33 through the pipe55 and is adapted to rise in'the well 51 to, a level indicated at 4 0a when the engine is idle. or during operation when the-valve 52 is closed which level will be the same as the'level in thecarburetor. bowl 33; Thusthe] overflow outlet 37 will normally tend to maintain a-predetermined level of fuel in the bowl 33 and the well 51." V The auxiliary jet 50 is adapted to be carthe carburetor 24 by screws61. The casting 60 is adapted toform a passage 65 and is provided with an opening 66 to allow the passage of air throughthe passageways 65, 23 and the intake 21'to the engine. 7 The jet 50 is adapted to be controlled by a control includes an eleotro-magnet 71, a housing -7 2 therefor, and the plunger 53.- The energization of the electro magnet 71 will-.80

cause the upward movement of the plunger 7 53 to thus'allow the suction createdby the engine cylinders to withdraw fuel :from the well 51', through the restriction 75 tothe engine. VVhenthe electro-magnet71 becomes" 85 deenergized the plunger will descend by gravity to shutoffthe fuel deliv'eryofthe auxiliary jet 50. The restriction 75 is of such size as ,to properly proportion the amount of fuel necessary for starting the engine while the electro-magnet is adapted to beenergize-donly during the startinglof the (engine. i sired, an overflow outlet 37 connected with A motor-generator having aishunt field winding 81 and a starting series fieldwinding supply tank 27 may be used to return exces- 32 is used for crankingthe engine,'receiving currentfrom a storage battery 83, and-1s battery and the motor-generator, a startlng switch 85 must be closed. The circuit from the battery through the motor-generator may be traced as follows: battery 83, wire 87 electro-magnet 71, wire 88, series winding 82, motor-generatorSO, wire 90, switch 85 and wire 91 to the other side of the battery.

Preferably, the starting switch 85 may be controlled automatically in a similar manner as disclosed and described in my copending application Serial No. 351,346, filed March 30, 1929, of which circuit I have shown for the purpose of the present invention the cranking circuit only. After the engine becomes self operative the series winding 82 and the electro-magnet 71 will become short-circuited in a like manner as disclosed and described in the said copending application. Thus the auxiliary jet will be operative to supply fuel to the engine only during the starting operation thereof. Preferably, the ampere turns of the electro-magnet 71 are so computed that the magnetic-strength thereof is sufiicient to hold the plunger 53 upward only when a heavy demand for current is present, which heavy demand is present only for a short interval during cranking.

In the present invention I have provided a simple, inexpensive auxiliary jet which is simple in its operation and which is provided with a positive restriction for supplying the proper amount of fuel to aid the starting of the engine.

While the form of embodiment of the invention as herein disclosed, constitutes a preferred form, it is to be understood that other formsmight be adopted, all coming within the scope of the claims which follow.

WVhat is claimed is as follows:

1. An internal combustion engine comprising in combination, an engine intake, a fuel feeding device for the engine comprising a fuel jet connected with the engine intake, a

fuel bowl for supplying fuel to the jet, means for maintaining a predetermined level of fuel in said bowl, and a priming device comprising a fuel jet within the engine intake, a duct connecting the second jet and bowl whereby the fuel level therein is controlled by the fuel level in the bowl, and an electrically operated valve within the intake and surrounding the second jet for controlling the fiow of fuel through the second jet.

2. An internal combustion engine comprising in combination, an engine intake, a fuel feeding device for the engine comprising a fuel jet connectedwith the engine intake, a

fuel level therein is controlled by the fuel level in the bowl, a valve within the intake and surrounding said port and cooperating with said substantially flat portion for controlling the fiow of fuel through said second jet, and electrically operated means for controlling said valve.

Intestimony whereof I hereto affix my signature.

FRANK F. STARR.

fuel bowl for supplying fuel to the jet, means for maintaining a predetermined level of fuel in said bowl, and a priming device comprising a fuel jet having a port for the passage of fuel therethrough and a substantially fiat portion surrounding said port, said jet being within the engine intake, a duct connecting the second jet and bowl whereby the 

